DO NOT MERGE - Merge Android 10 into master

Bug: 139893257
Change-Id: Id15a0e7908a1feee86bab8cedd06024518107dd5
tree: db22aa44e192ae2ba85ba897457a0a751d718f19
  1. Android.mk
  2. OWNERS
  3. README
  4. oem_template/
  5. proguard.cfg
  6. src/
  7. testing/